You could consider offering free art to give yourself further practice and better develop your style. :]
What do
you think of your art? Is there something you can agree you need to work on more?
For example, you could look into drawing more detailed eyes. There are several wonderful artists on Deviantart who share different styles of eyes that they have perfected.
This person has several. Here's ones done in pencil. I'm a writer, not a drawer, and when I do draw, it's mostly doodles in my notebook (instead of dutifully taking notes).
Most recent doodle. Eyes are one of the things I have the most trouble with, especially making them symmetrical.